Recent research on auditory-somatosensory interactions has shown contradictory results regarding their spatial modulation. In the present study we report on three experiments addressing auditory-somatosensory interactions in the region close to the head. Participants made speeded simple detection responses to single auditory, somatosensory or double simultaneous auditory-somatosensory stimuli. In Experiment 1, electrocutaneous stimuli were presented to either earlobe, while auditory stimuli were presented from the same versus opposite sides, and from one of two distances (20 or 70 cm) from the participant’s head. The results demonstrated a spatial modulation of auditory-somatosensory interactions, especially when auditory stimuli were presented from close to the head. Experiment 2, with electrocutaneous stimuli delivered to the hands (placed either close to, or far from, the participants’ head), suggests that the spatial modulation is dependent on the particular body part stimulated (head) rather than on the region of space (around the head) where the stimuli is presented. Experiment 3 shows that this auditory-somatosensory spatial effect occurs primarily for sounds containing high-frequency components. Taken together, these results show that the auditory-somatosensory multisensory integration is facilitated by stimuli occurring at the same location, and that this integration is dependent on stimulated body surface and stimuli acoustic spectra.